WOL via SSH; ether-wake with hostname instead of MAC?

So I've recently discovered the joys of SSH and tunneling as I finally figured out how to get public/private keys working. Now, I would like to be able to WOL machines via SSH as I've encountered some firewalls that block 8080 preventing me from accessing the web gui.

I understand that ether-wake can be used to WOL using the machine's MAC address as a parameter. However, is there a way to use the hostname as the parameter as I can't memorize the MAC address of machines on my network? The ether-wake help page states:

Send a magic packet to wake up sleeping machines. MAC must be a station address (00:11:22:33:44:55) or a hostname with a known 'ethers' entry.

Click to expand...

How do I go about configuring/accessing the "ethers entry"? I have static DHCP entries set up in Tomato already. (*Be mindful, I'm very inexperienced with Linux and its shell...)